From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Cross-section diagram of a wheel disc securing mechanism.
| Identifier | ExFiles\Box 147\3\ scan0154 | |
| Date | 1st January 1938 | |
| SECURING WHEEL DISC., Appln. No. 1591/38. | ||